LoadTest.java

package xeus.jcl.junit;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.net.URISyntaxException;
import java.net.URL;

import junit.framework.TestCase;

import org.apache.log4j.Logger;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;

import xeus.jcl.JarClassLoader;
import xeus.jcl.JclObjectFactory;
import xeus.jcl.JclUtils;
import xeus.jcl.exception.JclException;

@SuppressWarnings("all")
public class LoadTest extends TestCase {

    private static Logger logger = Logger.getLogger( LoadTest.class );

    public void testWithResourceName() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader( new String[] { "test-jcl.jar", "./test-classes" } );

        // New class
        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        // Locally loaded
        testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testWithClassFolder() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader( new String[] { "./test-classes" } );

        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testWithUrl() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException, URISyntaxException {
        // URL url = new URL("http://localhost:8080/blank/test-jcl.jar");
        File f = new File( "test-jcl.jar" );

        JarClassLoader jc = new JarClassLoader( new URL[] { f.toURI().toURL() } );
        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testWithInputStream() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        FileInputStream fis = new FileInputStream( "test-jcl.jar" );
        JarClassLoader jc = new JarClassLoader( new FileInputStream[] { fis } );
        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
        fis.close();
    }

    public void testWithSpring() throws FileNotFoundException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException {
        XmlBeanFactory bf = new XmlBeanFactory( new FileSystemResource( "spring-test.xml" ) );
        Object testObj = bf.getBean( "test" );
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testAddingMoreResources() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader();
        jc.add( "./test-classes" );
        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testChangeClassLoadingOrder() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader();
        jc.getSystemLoader().setOrder( 1 );
        jc.getParentLoader().setOrder( 3 );
        jc.getLocalLoader().setOrder( 2 );

        jc.add( "./test-classes" );

        // Should be loaded from system
        Object testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
        assertNotNull( testObj );

        testObj.getClass().getDeclaredMethod( "sayHello", null ).invoke( testObj, null );
    }

    public void testInterfaceCast() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader();
        jc.add( "test-jcl.jar" );

        JclObjectFactory factory = JclObjectFactory.getInstance();
        Object serializable = factory.create( jc, "xeus.jcl.test.Test" );

        Serializable s = JclUtils.cast( serializable, Serializable.class );

        assertNotNull( s );

        s = (Serializable) JclUtils.toCastable( serializable, Serializable.class );

        assertNotNull( s );

        s = (Serializable) JclUtils.clone( serializable );

        assertNotNull( s );
    }

    public void testUnloading() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader( new String[] { "./test-classes" } );

        Object testObj = null;
        jc.loadClass( "xeus.jcl.test.Test" );
        jc.unloadClass( "xeus.jcl.test.Test" );

        try {
            // Should get loaded from system
            testObj = jc.loadClass( "xeus.jcl.test.Test" ).newInstance();
            assertNotNull( testObj );
            return;
        } catch (ClassNotFoundException cnfe) {
            if( logger.isTraceEnabled() )
                logger.trace( cnfe );
            testObj = null;
        }

        assertNull( testObj );
    }

    public void testEnabledFlag() throws IOException, InstantiationException, IllegalAccessException,
            ClassNotFoundException, IllegalArgumentException, SecurityException, InvocationTargetException,
            NoSuchMethodException, JclException {
        JarClassLoader jc = new JarClassLoader( new String[] { "test-jcl.jar" } );
        jc.getLocalLoader().setEnabled( false );
        jc.getCurrentLoader().setEnabled( false );
        jc.getParentLoader().setEnabled( false );
        jc.getSystemLoader().setEnabled( false );

        try {
            jc.loadClass( "xeus.jcl.test.Test" );
        } catch (ClassNotFoundException e) {
            // expected
            return;
        }

        throw new AssertionError( "Expected: ClassNotFoundException" );
    }
}